Thin-film magnetic head with variable-volume cavity in medium-opposed surface

Inactive Publication Date: 2009-12-17
TDK CORPARATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]Therefore, an object of the present invention is to provide a thin-film magnetic head in which the magnetic spacing can be appropriately controlled, by dynamically and accordingly adjusting the pressure working between t

Problems solved by technology

However, there has been a problem that the magnetic spacing is likely to vary due to the change in pressure working between the thin-film magnetic head and the magnetic recording medium.
Further, in some cases, the head performance may be degraded due to frictional heat generated by the contact.
Furthermore, in some cases, the magnetic spacing

Method used

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  • Thin-film magnetic head with variable-volume cavity in medium-opposed surface
  • Thin-film magnetic head with variable-volume cavity in medium-opposed surface
  • Thin-film magnetic head with variable-volume cavity in medium-opposed surface

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Embodiment Construction

[0049]FIG. 1a shows a schematic view illustrating the main part of one embodiment of the magnetic tape apparatus according to the present invention. And FIG. 1b shows a perspective view schematically illustrating one mode of the configuration of the magnetic recording medium and the thin-film magnetic head according to the present invention.

[0050]As shown in FIG. 1a, the magnetic tape apparatus of the present embodiment includes: a tape head 10 as a thin-film magnetic head for performing read and write operations to a magnetic tape 11 as a magnetic recording medium; guide pins 15 for guiding the running of the magnetic tape 11; and a recording / reproducing and cavity-volume control circuit 16. The reference numeral 14 indicates reels for winding and unwinding (feeding) the magnetic tape 11.

[0051]The tape head 10 is provided for reading and writing data signals, whose tape baring surface (TBS) 100, which is the end surface on the magnetic tape 11 side or a medium-opposed surface (oppo...

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Abstract

Provided is a thin-film magnetic head in which the magnetic spacing can be appropriately controlled by dynamically and accordingly, by adjusting the pressure working between the thin-film magnetic head and the magnetic recording medium according to the change of conditions such as the change over time. The thin-film magnetic head comprises at least one cavity for adjusting a pressure working between the thin-film magnetic head and the magnetic recording medium, provided in a surface of the head opposed to the magnetic recording medium, and a volume of the at least one cavity being variable. When the magnetic recording medium passes through near the cavity, the cavity generates a (negative) pressure that attracts the head and the medium toward each other. The amount of the negative pressure depends on the volume of the cavity; thus, a magnetic spacing dMS can be controlled dynamically and accordingly by adjusting the volume.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a thin-film magnetic head used for magnetic recording, especially to a tape head for reading data from a magnetic tape and / or writing data to a magnetic tape. The present invention further relates to a magnetic tape apparatus provided with the tape head. The present invention furthermore relates to a method for controlling a magnetic spacing that is a distance between the end of the head element in the thin-film magnetic head and the surface of the magnetic record layer of the magnetic recording medium.[0003]2. Description of the Related Art[0004]In recent years, magnetic recording and reproducing apparatuses have been remarkably improved in capacity of storage data, corresponding to the widespread use of multimedia and the Internet. And magnetic tape apparatuses for backing up or storing data or for recording and reproducing audio video information are no exception of this trend of larg...

Claims

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Application Information

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IPC IPC(8): G11B5/58
CPCG11B5/6064G11B5/314
Inventor HACHISUKA, NOZOMU
Owner TDK CORPARATION
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